OPTICAL MATERIALS
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2024
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IF 3.8
Zhenyu Zeng,Hongxing Xie,Yun Ye,Xingke Zheng,Qizhong Lin,Enguo Chen,Sheng Xu,Tailiang Guo
Alloyed quantum dots (QDs) show great potential for photoluminescence (PL) applications. However, the oxidative decay of QDs during photoexcitation has been a major hurdle to the application of QDs. Blocking water-oxygen erosion by coating oxides on the surface of QDs is a common technique. Even though, this approach often leads to alterations in the optical properties of QDs and reduced compatibility with polymers. In this paper, hindered phenol was utilized to treat QDs to form QD/Hindered phenol complexes. Using the reduction of phenolic hydroxyl group in the hindered phenol, the hindered phenol was used as an exhausted substance to protect QDs from oxidation . After 450 h of aging, the obtained QD/Hindered phenol complex kept the photoluminescence quantum yield (PLQY) at 48 %. The luminance of the QD diffusion plate prepared by the QD/Hindered phenol complexes maintained above 98 % of the initial value after aging 1032 h. The introduction of phosphite ester further improved the photostability of QD/Hindered phenol complex under blue-light excitation. This technique promotes the application of QDs in polymers and offers a new reference for improving the stability of QDs under photoexcitation.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Xiaona Fu,Xu Pan,Qing Wen,Ye Chen,Cunguo Lin,Haiping Gao,Zhenghui Qiu,Liuqingying Yang,Haitao Xu
Microbial fuel cell (MFC) shows potential as an environmentally friendly energy technology, but the low power density restricts their practical applications. In this study, polypyrrole (PPy), carbon nanotubes (CNTs) and MoSe 2 were synthesized into a novel nanocomposite (PPy/MoSe 2 /CNTs) via a straightforward hydrothermal and in situ polymerization approach and served as the anode material of MFC. The charge transfer resistance (R ct ) of the PPy/MoSe 2 /CNTs (4.75 Ω) anode was significantly lower than that of PPy/MoSe 2 (13.75 Ω) anode and MoSe 2 /CNTs (12.36 Ω) anode. Furthermore, the maximum power density of the PPy/MoSe 2 /CNTs-MFC was 4.43 W/m 2 , which was 1.99 times and 1.61 times higher than that of the PPy/MoSe 2 -MFC (2.22 W/m 2 ) and MoSe 2 /CNTs-MFC (2.74 W/m 2 ), respectively. High-throughput sequencing confirmed that PPy/MoSe 2 /CNTs bioanode demonstrated outstanding biocompatibility and the function of screening excellent electrogenic microbes. On the one hand, the good bioelectrocatalytic performance of the PPy/MoSe 2 /CNTs bioanode could be attributed to the abundant pyrrolic nitrogen in PPy, which enhanced the attachment of C-type cytochrome (Omcs) and promoted the direct electron transfer (DET) process between the biofilm and the electrode. In addition, the conductive bridging Mo–N bonds further promoted the direct transfer of electrons in PPy, mediating the long-distance DET process. On the other hand, well-dispersed MoSe 2 not only provided numerous active sites, but also enhanced the Se cycle of microorganisms by affecting their energy metabolism pathways, thereby improving their electricity generation capacity. In addition to the above, the high electrical conductivity of CNTs increased the interfacial charge transfer rate. This study explored the use of molybdenum-based ternary material as anode material to construct high-performance MFC, which provided meaningful information for future practical applications of MFC.
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CHEMICAL ENGINEERING SCIENCE
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2024
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IF 4.1
Zhaohua Jiang,Jinjin Wen,Huiting Xu,Yufen Zhang,Haonan Zhai,Zhijie Cui,Honghai Wang,Junjie Qi,Wen Liu,Jiapeng Liu
Aqueous zinc-tellurium (Zn-Te) batteries based on conversion reactions between Zn and Te have sparked significant interest due to their cost-effectiveness, high theoretical specific capacity and outstanding safety features. Nevertheless, the sluggish kinetics pose a barrier to the advancement of aqueous Zn-Te batteries. In this study, zero-dimension (0D) nanodots and three-dimensional (3D) nanoflowers molybdenum diselenide (MoSe 2 ) are in situ grown on the holey reduced graphene oxide (HrGO) by a confinement synthesis strategy. Benefiting from the simultaneous presence of (0D/3D)MoSe 2 , excellent conductivity of holey reduced graphene oxide and unique hierarchical structure, the (0D/3D)MoSe 2 @HrGO hybrid greatly promotes the redox kinetics between Zn and Te conversion. Consequently, the constructed aqueous Zn-Te batteries equipped with a Te@(0D/3D)MoSe 2 @HrGO cathode demonstrate remarkable specific capacity (reaching 505 mAh/g at a current density of 0.15 A/g) along with outstanding long-term cycling stability. Additionally, the underlying conversion mechanism has been meticulously explored through extensive analytical techniques. This research introduces an innovative approach to boost the electrochemical performance of aqueous zinc-tellurium batteries.
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ADVANCED FUNCTIONAL MATERIALS
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2024
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IF 18.5
Bing Hao,Manyuan Gan,Jingjing Guo,Guoshen Li,Yanhui Song,Yongqing Shen,Bingshe Xu,Peizhi Liu,Junjie Guo
The rational design and fabrication of 2D heterojuctions are proven a promising strategy for boosting the performance of electrocatalysts. Although 2D platinum diselenide (PtSe 2 ) exhibits catalytic activity for hydrogen evolution reaction (HER), the catalytic performance is still unsatisfactory due to its inert basal plane, wide bandgap, and poor electron transfer ability. Herein, a new strategy is reported to construct PtSe 2 /PtCo heterojunctions by partial selenization of PtCo alloy for high-efficiency HER electrocatalyst, which exhibits a low overpotential of 38 mV at the current density of 10 mA cm −2 , a small Tafel slope of 22 mV dec −1 , and a superior stability over 24 h and 1000 cycles. The outstanding HER activity of the catalyst arises from the strong electronic interactions between PtSe 2 and PtCo in the heterojunctions, which induce electron transferring from PtSe 2 to PtCo and the d-band center down shifting, and thus optimize the H * adsorption/desorption. This work provides a novel strategy for constructing highly efficient heterostructure electrocatalysts, which facilitates the applications of hydrogen energy conversion.
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2025
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IF 6.2
Zhuoming Xu,Mohammad Nisar,Junze Zhang,Fu Li,Shuo Chen,Guangxing Liang,Jingting Luo,Zhuanghao Zheng,Yue-Xing Chen
SnSe, known for its low thermal conductivity and eco-friendly nature, is a potential medium-temperature thermoelectric (TE) material. However, its low carrier concentration has hindered achieving a high ZT value in n-type SnSe. This study reports the successful preparation of n-type polycrystalline SnSe 0.95-x (CuI) x samples via mechanical alloying and spark plasma sintering, which significantly increased carrier concentration and introduced point defects, enhancing phonon scattering and reducing lattice thermal conductivity. Density functional theory (DFT) calculations reveals that CuI doping altered the bandgap and band degeneracy, enhancing the density-of-states effective mass and benefiting the Seebeck coefficient. The ZT value for the x = 0.03 sample reached a peak of 0.74 at 773 K, marking a significant improvement over the undoped sample. This study presents an effective approach to optimize TE properties through CuI doping, offering a stable and effective method to enhance the thermoelectric performance of n-type polycrystalline SnSe.
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Journal of Energy Chemistry
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2025
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IF 14.9
Huan Ma,Xuntao Zhang,Mingxuan Tang,Zhenjiang Lu,Min Wang,Xinxin Yin,Jing Xie,Jindou Hu,Yali Cao
Sodium-ion batteries (SIBs) show promising potential in the field of electrochemical energy storage due to their cost-effectiveness and similar operational mechanisms to lithium-ion batteries (LIBs). However, the dramatic volume expansion of electrode materials and the slow reaction kinetics caused by the large sodium ion (Na + ) radius hinder the practical application of SIBs. Here, we successfully prepared SnS 2− x Se x nanodots embedded within N-doped carbon nanofibers (CNF) for use as electrode materials of SIBs. The introduction Se provided abundant anionic defect sites for sodium-ion storage and enlarged the interlayer spacing of SnS 2 . In addition, the ultrafine nanodot structure reduces the volume expansion of SnS 2− x Se x and shortens the ion transport path. As an anode of SIBs, SnS 2− x Se x /CNF demonstrates remarkable reversible capacity (719 mAh g −1 at 0.5 A g −1 ), along with rapid charging ability (completing a charge in just 127 s). Meanwhile, the assembled full-cell battery manifested exceptional energy density of 165.8 Wh kg −1 at a high-power output of 5526 W kg −1 . This study presents an effective strategy for fabricating high-performance sulphide-based anode materials for SIBs, offering broad prospects for application.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Henglong Ren,Hao Guo,Yanrui Hao,Yu Liu,Liping Peng,Wu Yang
Transition metal sulfides (TMSs) have significant potential in energy storage applications due to their high theoretical capacity and diverse reaction mechanisms. However, performance limitations in supercapacitors arise from various intrinsic defects, including low active material utilization and poor cycling stability caused by unstable electrical conductivity. To address these issues, this paper incorporates selenium atoms into sulfides, aiming to leverage selenium’s high conductivity to enhance the electroactivity of transition metal sulfides. This approach improves both the conductivity of sulfides and the ion transport rate as well as enhances structural stability. Furthermore, a hierarchically porous structure of metal–organic framework (MOF) is synergistically optimized to augment the composite’s energy storage capacity. The resulting MnS@NiCoSeS-1 composite demonstrates excellent electrochemical performance, achieving a specific capacity of 901.0 C g −1 at 1 A g −1 in a three-electrode configuration, with a capacity retention of 82.6 % after 10,000 cycles at 3 A g −1 . Additionally, the hybrid supercapacitor (HSC) constructed from this composite exhibits a high specific energy of 78.85 Wh kg −1 at a power density of 775.2 W kg −1 . These findings validate the effectiveness of co-doping strategies for optimizing active material utilization and provide novel insights into the design of supercapacitors with both high energy and power densities.
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PubMed
高影响因子
ACS Applied Nano Materials
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2024
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IF 5.3
Hao Hao,Meng Liu,Ge Tang,Yi Liu,Feng-Lei Jiang
Thiol ligands are widely used to modify quantum dots (QDs) due to their strong affinity. Aromatic structures can be introduced to improve the charge transport of the QDs. In this work, the as-synthesized CdSe/ZnS core/shell QDs were modified with thiolphenyl (TP) derivatives by ligand exchange. Photoluminescence (PL), ultraviolet–visible (UV–vis) absorption, and time-resolved photoluminescence (TRPL) spectroscopy were used to investigate the optical properties of QDs before and after ligand exchange. The elemental quantification by energy-dispersive X-ray (EDX) spectroscopy proved that TP ligands were adsorbed. The PL intensities of QDs were enhanced after ligand exchange with TP ligands (except for pentafluorothiophenol, PF-TP) through passivation. Besides, the QDs exhibited better stability and electrical conductivity. Combined with 1H nuclear magnetic resonance (1H NMR), fluorescence spectroscopy, and isothermal titration calorimetry (ITC), the effects of electron-donating/-withdrawing ability and steric hindrance of the substituents on the ligand exchanges were analyzed. The reactions of QDs with TP ligands containing electron-donating substituents were exothermic and entropy-decreasing. However, the reactions with those ligands containing electron-withdrawing substituents were exothermic and entropy-increasing. Interestingly, the reaction of PF-TP with QDs could be fitted to a two-stage model. In general, we found that the stronger electron-donating ability of substituent would lead to less desorption of OA ligands, thus fewer trap states, and better passivation, stability, and conductivity of QDs. Good stability and conductivity of QDs are prerequisites for high performance in displays. This work will greatly contribute to the selection of aromatic ligands for QDs.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2024
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IF 4.1
Libo Yu,Zhen Li,Weiqiang Qiao,Junke Wang,Chengshuang Zhao
Light harvesting plays crucial role for high photovoltaic performance of quantum dots sensitized solar cell (QDSSC). However, there are still issues need to be tackled, such as enlarging light response range and enhancing light scattering capability. In this work, TiO 2 eggshell hollow microspheres (EHMS) were synthesized by carbonaceous microspheres (CMS) template method and co-sensitized by CdS/CdSe/PbS quantum dots (QDs) for application in QDSSC . Compared with QDSSC based on TiO 2 nanoparticles (NP) and TiO 2 hollow microspheres (HMS), the TiO 2 EHMS based QDSSC showed a remarkable increase of short-circuit current density (J sc ) to 24.81 mA cm −2 with a power conversion efficiency (PCE) of 4.07 %. Photoelectrochemical analysis of QDSSC indicate that CdS/CdSe/PbS QDs can enlarge the light response range, and the TiO 2 EHMS improve the light scattering, leading to the improvement of light harvesting efficiency. Charges dynamics tests results proved that a larger charges recombination resistance at photoanode/electrolyte interface and longer electron lifetime can be achieved with TiO 2 EHMS, contributing to the boost of J sc . The presented study introduces a simple strategy for researchers interested in designing photoanode for various photoelectrochemical applications.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Xinyuan Zhang,Yongkang Lai,Liang Zhang,Zheng Chen,Jiulong Zhao,Shige Wang,Zhaoshen Li
Helicobacter pylori ( H. pylori ) is one of the major causes of gastrointestinal diseases, including gastric cancer. However, the acidic environment of the stomach and H. pylori resistance severely impair the antimicrobial efficacy of oral drugs. Here, a biocompatible chitosan-modified molybdenum selenide (MoSe 2 @CS) was designed for the simultaneous photothermal treatment of H. pylori infection and gastric cancer. MoSe 2 @CS showed a photothermal conversion efficiency was as high as 45.7 %. In the H. pylori -infected mice model, MoSe 2 @CS displayed a high bacteriostasis ratio of 99.9 % upon near-infrared irradiation. The antimicrobial functionality was also proved by transcriptomic sequencing study, which showed that MoSe 2 @CS combined with NIR laser irradiation modulated the gene expression of a variety of H. pylori bioprocesses, including cell proliferation and inflammation-related pathways. Further gut flora analysis results indicated that MoSe 2 @CS mediated PTT of H. pylori did not affect the homeostasis of gut flora, which highlights its advantages over traditional antibiotic therapy. In addition, MoSe 2 @CS exhibited a good photothermal ablation effect and significantly inhibited gastric tumor growth in vitro and in vivo . The comprehensive application of MoSe 2 @CS in the PTT of H. pylori infection and gastric cancer provides a new avenue for the clinical treatment of H. pylori infection and related diseases.
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Journal of Materials Chemistry A
·
2025
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IF 9.5
Yupei Ding,Jie Zhu,Minxia Jiang,Xiaowan Zhan,Jinwen Qin,Xue Jiang,Shuaifeng Wang,Tao Meng,Minhua Cao
RuSe2 has been considered an efficient alkaline hydrogen evolution reaction (HER) electrocatalyst due to its fast water dissociation kinetics and lower price. However, its strong affinity to the adsorbed active intermediates blocks the active sites, hence largely falling short of its full activity potential. Herein, we report a feasible competitive adsorption strategy by introducing oxyphilic molybdenum (Mo) species into RuSe2 (Mo–RuSe2) to regulate the strong interaction between the Ru sites and HER intermediates, enabling highly efficient alkaline HER performance. In situ experimental and theoretical calculation results reveal that the oxyphilic Mo tailoring for RuSe2 can not only alleviate OHad blocking on the Ru sites by the competitive adsorption of OHad between the Ru and Mo sites, but also optimize the hydrogen adsorption Gibbs free energy, thus facilitating the OHad transfer and H2 release process, both of which synergistically promote the regeneration of Ru active sites. The optimized Mo–RuSe2 exhibits an overpotential at 10 mA cm−2 as small as 27 mV and a low Tafel slope of 39 mV dec−1, as well as remarkable long-term stability. This finding is expected to shed new light on developing highly efficient alkaline HER catalysts by regulating the adsorption strength between the active sites and intermediates.
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MATERIALS RESEARCH BULLETIN
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2024
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IF 5.3
Jin Liu,Liexiang Ren,Jujie Luo,Huitao Li
The low capacity of negative electrode materials for supercapacitors limits their practical applications. In this study, the bimetallic selenides Bi 2 Se 3 /FeSe 2 were efficiently prepared by a convenient one-step microwave method. The attributes of nanoparticles such as surface morphology, crystal structure, elemental valence, and distribution regions were verified by a series of characterization tools. The composite electrode exhibits high electrochemical performance in the 1.2 V negative potential window. The capacitance of the Bi 2 Se 3 /FeSe 2 electrode is 274 mAh g −1 at 1 A g −1 . These results indicate that Bi 2 Se 3 /FeSe 2 holds great potential for supercapacitor anode materials. In particular, the asymmetric water-based supercapacitor dual-electrode device (NiSe/NiTe 2 //Bi 2 Se 3 /FeSe 2 ) shows an impressive power/energy density of 56.25 Wh kg −1 at 774.67 W kg −1 . The capacitance of ASC is reduced by 20.10 % and the coulomb efficiency is maintained at 99.45 % over 3000 cycles.
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